38 visiting now: 23 USA 
7 Singapore 
2 Canada 
2 China 
2 France 
1 Iran 
1 Belgium 
1 Brazil 
1 UK 
7 Singapore 2 Canada 2 China 2 France 1 Iran 1 Belgium 1 Brazil 1 UK 7 Singapore 2 Canada 2 China 2 France 1 Iran 1 Belgium 1 Brazil 1 UK